12389917 has 2 divisors, whose sum is σ = 12389918. Its totient is φ = 12389916.

The previous prime is 12389911. The next prime is 12389963. The reversal of 12389917 is 71998321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 1240996 = 3339^2 + 1114^2 .

It is an emirp because it is prime and its reverse (71998321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12389917 - 2⁷ = 12389789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12389917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12389911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6194958 + 6194959.

It is an arithmetic number, because the mean of its divisors is an integer number (6194959).

Almost surely, 2^12389917 is an apocalyptic number.

It is an amenable number.

12389917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12389917 is an equidigital number, since it uses as much as digits as its factorization.

12389917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 12389917 is about 3519.9313913768. The cubic root of 12389917 is about 231.3961518773.

The spelling of 12389917 in words is "twelve million, three hundred eighty-nine thousand, nine hundred seventeen".